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20 page 92: résoudre ces équations
a) 3x-7=2x+9
b) 32-15x= -18+10x
c) 1.5x=305x-10
d)x/2+14=x/2-3
20 page 92: résoudre ces équations
a) 3x-7=2x+9
b) 32-15x= -18+10x
c) 1.5x=305x-10
d)x/2+14=x/2-3
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Verified answer
a) 3x-7=2x+93x - 2x = 9 + 7
x = 16
b) 32-15x= -18+10x
- 15x - 10x = - 18 - 32
- 25x = - 50
x = 50/25
x = 2
c) 1.5x=305x-10
1,5x - 305x = - 10
- 303,5x = - 10
x = 10/303,5
d)x/2+14=x/2-3
x/2 - x/2 = - 3 - 14
0x = insoluble